bit manipulation functions

[Tobias Schlüter]

Steve Kargl wrote:
> Thanks.  Note, f90-intrinsic-bit.f in the g77 testsuite now almost
> compiles.  I haven't looked at this failure, yet.  But, someone 
> familiar with the gfortran testsuite may want to integrate 
> f90-intrinsic-bit.f into it.

I have a patch which fixes the compiler error and the linker error, which is
of course hidden by the compielr error.  Unfortunately, the execution test
fails with my patch.  I'll look into this on Tuesday.

- Tobi